Enhancing the learning of evolutionary anthropology skills by combining student‐active teaching with actual and virtual immersion of Master's students in fieldwork, laboratory practice, and dissemination

Abstract Higher education in evolutionary anthropology involves providing students with in‐depth knowledge of biological and cultural heritage sites and collections that are frequently inaccessible. Indeed, most sites, fossils, and archaeological remains can be visited or manipulated only rarely and solely by specialists with extensive experience. Owing to the development of 3D and medical imaging techniques, this fragile heritage is now more widely accessible, and in a dynamic way. However, exclusive adoption of virtual teaching and learning has a negative impact on student engagement and, naturally, on exchanges with instructors, and thus cannot be used without some reservations. In the ITAP (Immersion dans les Terrains de l’Anthropologie biologique et de la Préhistoire) project of the higher education STEP (Soutien à la Transformation et à l’Expérimentation Pédagogiques) transformation program at the University of Bordeaux, we combine student‐active teaching with Master's students fully immersed in ongoing fieldwork, laboratory study, and dissemination of research results in order to develop more individually shaped learning curricula and to foster both professional and new interdisciplinary skills. Here, we present examples of experiments conducted in the ITAP project using both authentic and virtual collections of archaeological, experimental, and reference materials that help to break down the barriers between research activities and higher education, as well as providing a more general appraisal of the appropriate use of virtual tools in higher education by combining them with real‐life situations.


| INTRODUC TION: EMB R ACING OR FACING THE D I G ITAL RE VOLUTI ON IN HI G HER EDUC ATI ON
In a world where digital technology occupies a prominent place, its use and the increased variety of pedagogical practices it entails have gradually been integrated into university programs. As a tool with considerable cognitive benefits, the impact of digital technology on student learning and success needs to be taken into consideration and regularly assessed as technologies rapidly evolve: for example, their impact on student attention span, the potential disconnection from reality, the lack of exchange with instructors, and the limits of virtual exchanges, but also their role in developing a taste for learning, the acquisition of 21 st -century skills, access to new data, and intellectual stimulation (Karsenti, 2018). Researchers have been working on all these issues for several decades already, but they have clearly been amplified as a result of the global health crisis in 2020 (Point, 2020).
Natural and social sciences are based on observation and the quantification of physical or "concrete" data. Situated at the crossroads between observation and quantification, evolutionary anthropology is no exception. Delivering courses in both biological anthropology and prehistoric archaeology, the University of Bordeaux fully embraces the tradition of holistic approaches to examining the human past, training for future higher education employment and research, field archaeology and bioarchaeology, heritage curation, medico-legal studies, and broad public dissemination professionals in its dedicated Master's program. In order to give students the opportunity to learn the required professional skills, it is essential to expose them to real-life situations during field trips and excavations and to permit them to manipulate research materials and objects. Furthermore, teaching in ways that include fieldwork, practical activities, and experiments enhances student learning outcomes, stimulating senses linked to several areas of the brain (Gya & Bjune, 2021;Nabors et al., 2009;Willis, 2007). Such activities are mainly conducted in groups. This promotes the development of problem-solving and thinking skills and typically involves a communal atmosphere, building student confidence and potentially reducing the release of stress hormones in their brains, which in turn removes a factor that can impede learning (Owens & Tanner, 2017). In addition, conducting real fieldwork and experiments enhances student engagement and the emergence of skills by offering them the possibility to participate as scientists and to conduct joint projects with instructors (Hole, 2017). Moreover, evolutionary anthropology is relatively unique in that it relies on heritage sites and materials (e.g., cave paintings, hominin fossils, unique archaeological artifacts), as well as on extant data (notably human biological data, rare animal taxa, unique reference collections) that are scattered across the globe and can only rarely be accessed or manipulated.
While various reproduction techniques have existed for some time (e.g., reconstructions, casts...), in many cases they cannot be used for materials that are too fragile or too complex. Above all, there is often significant degradation of the original specimens involved in their production. Furthermore, the cost of conducting practical activities and off-campus fieldwork courses is comparatively high.
As a result, student training is not only impeded by the preservation of rare and fragile materials and ethical concerns (e.g., personal data protection, confidentiality, taboos regarding human bodies) but also cuts to university budgets. Together with the impact of the current pandemic, this makes it increasingly challenging to rely only on practical in-person learning activities to train future evolutionary anthropology professionals.
Consequently, virtual imaging has been a game-changer in the discipline as it has opened up broader access to the scarce heritage composed of a few sites and fragile fossils and artifacts, whose conservation and study mirror major societal issues such as climate change, reduced biodiversity, and resource scarcity (Macchiarelli & Weniger, 2011;Semal et al., 2005). In addition to this, it has permitted broader access to otherwise inaccessible specimens and sites which currently provide the raw material for many research projects. Without replacing direct access to sites and materials when possible, their virtual observation or manipulation can efficiently complement such access. Indeed, in addition to their essential role in immortalizing heritage sites and collections, non-invasive imaging techniques permit full access to a variety of sites, fossils, and visualization of external and internal constituents of objects and biological Grant/Award Number: AAPR2021-2020-11779310 and 2016 in ongoing fieldwork, laboratory study, and dissemination of research results in order to develop more individually shaped learning curricula and to foster both professional and new interdisciplinary skills. Here, we present examples of experiments conducted in the ITAP project using both authentic and virtual collections of archaeological, experimental, and reference materials that help to break down the barriers between research activities and higher education, as well as providing a more general appraisal of the appropriate use of virtual tools in higher education by combining them with real-life situations.

K E Y W O R D S
3D imaging, evolutionary anthropology, fieldwork, laboratory practice, student engagement, student-active teaching structures from around the world. For example, they can reproduce extremely faithful images of surfaces thanks to meshed and/or textured 3D models at different scales, from a macro/meso-scopic scale (e.g., object or ground-based photogrammetry; reviewed in Magnani et al., 2020) to a micro/nano-scopic one (e.g., confocal microscopy; reviewed in Calandra et al., 2019;Schmidt et al., 2020), and can make their internal structures accessible, and at a very high resolution (e.g., X-ray, synchrotron radiation, or neutron microtomography; reviewed in Bayle et al., 2011;Macchiarelli et al., 2013;Tafforeau et al., 2006;Zanolli et al., 2020).
While these digital advances offer fantastic possibilities in evolutionary anthropology, their potential negative effects in higher education on anchoring students to real-life situations, the potential lack of communication with instructors, as well as the very high carbon footprint for the production and storage of increasingly heavy multimedia data, cannot be ignored. Archiving several copies of heavy 3D raw data files and models on different servers for years has a substantial carbon footprint, which easily dwarfs the footprint associated with transporting students to fieldwork locations within the region but not immediately adjacent to university urban settings. In order to make the best use of the potential of digital technology for student learning, without denying its negative effects, we therefore can choose between two fieldwork courses. One field school takes students to the excavation and associated fieldwork of a prehistoric site. Here, the research objectives are to reconstruct the biological and cultural evolution of past hominins based on the study of their biological identity and lifeways. For the last five years, this field school has been conducted at the Pleistocene hunters-gatherer base camp of Le Piage (Fajoles, Lot, France) (Bordes et al., 2008). In this paper, we illustrate our experiential off-campus learning practices with examples from this fieldwork course.
Le Piage is located at the foot of a Coniacian limestone cliff containing numerous karstic cavities. Excavated between 1958 and 1968, and again since 2004, the deposits have yielded Mousterian, Châtelperronian, Protoaurignacian, Early and Late Aurignacian, Solutrean, and Badegoulian cultural complexes occurring from 55,000 to 20,000 years BP (Bordes et al., 2008;Champagne & Espitalié, 1981). This multi-stratigraphic site provides archaeological strata that have revealed very rich lithic and faunal remains, as well as adornments and human remains. Appearing around 42,000 years ago in Southern Europe, the Protoaurignacian cultural complex is extremely important to the debate on the settlement processes of modern humans in Western Eurasia as it corresponds to a period when Neandertals still occupied this region (Hublin, 2015). Few

Protoaurignacian levels have been found up to the present time. Le
Piage is among the few sites that have yielded Protoaurignacian levels and is one of the extremely rare sites to have yielded human remains associated with this archaeological cultural complex (Benazzi et al., 2015). These characteristics make it a key piece of the puzzle concerning the makers of tools and artifacts during a period marked by dramatic biological and cultural changes in Eurasia (Hublin et al., 2020;Zilhão et al., 2015). Furthermore, complex post-depositional natural processes occurred at the site, notably solifluction which mixed the Solutrean and Badegoulian cultural material. All these factors make this site of equal and major interest for geoarchaeologists, archaeologists, paleontologists and biological anthropologists.
Every year, students are divided into groups, with each group responsible for excavating a specific area of the site (generally a quarter of a square meter) and handling the associated post-excavation processing, as well as writing the excavation report for that part of the site (Figure 2a). Students are invited to propose excavation strategies for the area they are entrusted with and to discuss their ideas with the supervisory team. This experiential off-campus learning fosters exchange with instructors on observations made directly by the students in the field, giving them a better grasp of the related questions (Figure 2b). By giving students the opportunity to excavate renowned archaeological sites and to work with authentic archaeological material, the fieldwork course offers them a unique opportunity to make new discoveries, sometimes of major importance to our knowledge of human evolution. Giving them enough time to manage the entire process, to actively work as a team, and to optimally interact with all the specialists involved in the fieldwork ( Figure 2c) increases their engagement to reach common objectives, placing this course at the most student-active end of the off-campus experiential learning spectrum (for a recent review, see Gya & Bjune, 2021). The positive effects of this practice have been highlighted in recent years by the students' ability to generate new questions during fieldwork, reveal new findings, and contribute to excavation reports and further dissemination of results (Bordes et al., , 2019(Bordes et al., , 2020Faivre et al., 2015;Rottier et al., 2017).   (Bayle, Maureille, et al., 2017).
Given the uniqueness of high-profile cultural heritage resources, however, access to authentic sites and materials is rare. To be suitably prepared, students have to learn practical skills which cannot be acquired solely through face-to-face teaching due to the limited time available. Under the guidance of instructors, students are therefore entrusted with the preparation of educational resources to be taken home. For example, toolkits were created for major categories of stone débitage found in Paleolithic sites with knapping products experimentally replicated and/or coming from collections of unknown archaeological origin. The students can thus practice identifying stone artifacts at home, as well as conjoining exercises between parts from a same block of raw material, allowing them to reconstruct the chaîne opératoire employed by prehistoric humans (see the importance of such practices in Audouze & Karlin, 2017). In addition to the use of physical materials to be taken home, we rely on the considerable potential of 3D virtual imaging to increase the prerequisite skills of students required to work with original sites and specimens.

| PREPARING FIELD AND L ABOR ATORY WORK US ING VIRTUAL IMAG ING
Owing to their non-invasive nature and high potential for real-time exploration and quantification of structures, 3D imaging techniques are now widely used in evolutionary anthropology. A striking illustration can be found in the Lascaux Paleolithic decorated cave, access to which is extremely limited for conservation reasons, but which can now be visited in 3D (see https://arche ologie.cultu re.fr/ lasca ux/fr/visit er-grott e-lascaux).
In addition to its value in the virtual exploration of sites that are rarely or not at all accessible, 3D imaging can be used to integrate archival data in archaeological fieldwork (Discamps et al., 2016) or to allow students or volunteers to explore a site before they participate in its actual excavation. With this in mind, in 2018, we began to develop the "Virtual Sirogne" application which provides a dynamic introduction to this prehistoric site ( Figure 3). The application includes photogrammetric models of the whole cave, its fill, objects, nonhuman animal fossils, as well as microtomographic-based images and 3D models of the Neandertal remains. This practical experience not only gives access to fossilized human remains and to their external and internal structures in a way that is unique in higher education, in other words, through full access to the remains virtually presented within the 3D model of the site of their discovery, but also offers prior immersion in a real-life archaeological excavation. Thus, students and volunteers participate in the fieldwork only after acquiring in-depth knowledge of the context and challenges of the field research being conducted. Moreover, the scientific team specialists can discuss the progress of their research better, even remotely from the site, providing opportunities for more frequent updates and brainstorming. The application is currently only available to students in our Master's program who provide regular feedback and thus contribute to its development. With some adaptation, it will also be a valuable tool for disseminating our findings to the public. A video showing the cave, its environment, some of the 3D models, and educational resources is available at: https://youtu.be/BYhtfV_5R44.
In addition to those displayed in the "Virtual Sirogne" application, the fossilized and modern teeth and bones, as well as archaeological and reference lithic and bone artifacts, and personal ornaments studied by laboratory members have now been digitized in 2D and 3D at different resolutions as part of the ITAP project.  Jaeger et al., 2011;Kivell, 2016;Le Luyer et al., 2016;Macchiarelli et al., 2004;Olejniczak et al., 2008;Rossi et al., 2004;Skinner et al., 2008;Stoessel et al., 2016;Tafforeau & Smith, 2008;Zanolli et al., 2019). It has therefore become essential to enable students in evolutionary anthropology to acquire the skills of 3D image analysis. To this end, we have adopted face-to-face teaching in the image processing laboratory, where students practice under guidance and conduct investigations using 3D models of fossils and artifacts. However, due to time constraints, students are encouraged to individually access a dedicated space on the educational platform of the University of Bordeaux, where they can explore the 3D collection of digitized teeth, bones, and artifacts, together with a large collection of photographs and radiographic images ( Figure 4). Since the early 2010s and following the pioneering initiatives of 3D data-sharing on digital media (Seidler et al., 1999), online repositories have multiplied, and there are now many platforms that share 3D data for evolutionary anthropology research F I G U R E 3 Screenshots of the "Virtual Sirogne" application: (a) the 3D model of the cave and of the different activities with a "wall pass effect" passing through the east wall (zenithal section view of the cave in the top right-hand corner); (b) the grid with the first year of excavation of the different squares located on the 3D model of the cave as viewed from its entrance; (c) the stratigraphic layers located on the 3D model of the cave seen from its entrance; (d) the home page of the human fossil module showing microtomographic-based models; (e) the exploration through the microtomographic-based model of a fossilized human left mandibular dental arcade with extraction of a virtual slice; (f) the teeth virtually extracted from the microtomographic-based model of a fossilized human left mandibular dental arcade and showing the variation of enamel thickness ranging from "thin" blue to "thick" red (development of the application by Archéosphere) and/or didactic purposes (see Lebrun & Orliac, 2017

| RECON CILING VIRTUAL AND RE AL-TIME LE ARNING ME THODS VIA 3D PRINTING FOR FIELDWORK S E T TING S
The virtual and real-time learning can be fully reconciled to make the most of their complementary advantages. One example would be to use 3D printing as an educational resource during fieldwork. Guided by the sensitive nature of the research currently conducted at Le Piage, we decided to produce high-resolution 3D replicas of specimens that can be used in a hands-on manner in fieldwork settings (called the "mallette tout-terrain" or "all-terrain study case").  Bordes, 2010;Benazzi et al., 2011Benazzi et al., , 2015Gravina et al., 2018;Higham et al., 2011;Zilhão et al., 2015), the neonate human remains found at Le Piage are of utmost importance.
The importance of their association with the stratigraphic and archaeological context means that being able to recognize such remains in situ during excavations rather than during the post-excavation sieving process of the sediment is fundamental to accurately associating human remains with their chronocultural context. As juvenile osteology is very complex, particularly for neonates (e.g., Scheuer & Black, 2004), developing the ability to recognize such human remains requires years of practice, which is impossible given the time constraints in undergraduate and graduate courses. In this context, Master's students, under the guidance of the fieldwork coordinators and paleoanthropologists in the scientific team, were entrusted with assembling an educational toolkit made of high-resolution 3D replicas to be taken into the field. To this end, they were entrusted with microtomographic-based replicas of a complete modern human neonate skeleton and the three fossil neonate remains (left pars lateralis of the occipital, right tibia, and left ulna) found during excavation by Champagne and Espitalié (1981) (Figure 5). The effect of the experiment was extremely positive as demonstrated by the success of the excavation. While no human remains were found, the students were highly motivated and fully embraced their responsibility in preparing the educational toolkit and making the best use of it. In particular, they were able to distinguish cervid juvenile remains from those of humans.

| THE YE ARLY MA S TER ' S S TUDENTS SYMP OS IUM
In parallel with their virtual and on-site immersion in both the field and laboratory, Master's students complete another student-active experiment which takes them to the final phases of the scientific process, in other words, disseminating results. To this end, following an introduction on how current scientific research works (designing a project, building a team, seeking funding, dissemination, the workings of the peer-review process), they organize a poster symposium based on a major research topic in evolutionary anthropology.
Students partake in both the symposium organizational and scientific committees, assuming all the roles involved in organizing a symposium and, more generally, an event, including an editorial committee, communications, internal organization, purchasing and finances, graphic design, and organization of the day itself. They must actively work together and interact with departmental members during the half-day poster symposium held in the PACEA teaching laboratory.
The entire course and the symposium are conducted in English to

| CON CLUS ION
In conclusion, the examples given in this paper resonate with other similar experiences as well as findings from neurobiological research to make a strong case for active teaching strategies and "think-pair-share methods" that capture student attention and that help to develop their skills and practices (e.g., Owens & Tanner, 2017). Moreover, these experiences encourage use of virtual tools that improve active teaching strategies by extending the potential to immerse students in real-life professional situations. They reflect the shift to the virtual in evolutionary anthropology courses at its best, namely to access sites, fossils and objects otherwise only virtually available, as well as to release the data hidden within the fossils and objects and preserved on micro-or nano-scopic scales on their surfaces that are otherwise inaccessible. In addition, some theoretical fundamentals are instilled and re-enforced, such as home-based self-learning, which is a prerequisite for the most pro-

CO N FLI C T O F I NTE R E S T
The authors declare no potential conflict of interest.

DATA AVA I L A B I L I T Y S TAT E M E N T
Educational videos and 3D models are available directly from the above-mentioned websites. Online exercises using these multimedia sources are available to Master's students on the educational platform of the University of Bordeaux and are more widely available upon request to the corresponding authors. The "Virtual Sirogne" application will be available online after publication of the results of the ongoing site excavation.